1OH4

Structural and thermodynamic dissection of specific mannan recognition by a carbohydrate-binding module

Summary for 1OH4

• Entry DOI: 10.2210/pdb1oh4/pdb
• Related: 1OF3 1OF4
• Descriptor: BETA-MANNOSIDASE, beta-D-mannopyranose-(1-4)-[alpha-D-galactopyranose-(1-6)]beta-D-mannopyranose-(1-4)-[alpha-D-galactopyranose-(1-6)]beta-D-mannopyranose-(1-4)-beta-D-mannopyranose-(1-4)-beta-D-mannopyranose, GLYCEROL, ... (6 entities in total)
• Functional Keywords: hydrolase, carbohydrate binding module, mannan, lectin, glycoside hydrolase
• Biological source: THERMOTOGA MARITIMA
• Total number of polymer chains: 1
• Total formula weight: 21962.35

Authors

Boraston, A.B.,Revett, T.J.,Boraston, C.M.,Nurizzo, D.,Davies, G.J. (deposition date: 2003-05-21, release date: 2004-03-16, Last modification date: 2023-12-13)

Primary citation

Boraston, A.B.,Revett, T.J.,Boraston, C.M.,Nurizzo, D.,Davies, G.J.
Structural and Thermodynamic Dissection of Specific Mannan Recognition by a Carbohydrate Binding Module, Tmcbm27
Structure, 11:665-, 2003

PubMed Abstract: The C-terminal 176 amino acids of a Thermotoga maritima mannanase (Man5) constitute a carbohydrate binding module (CBM) that has been classified into CBM family 27. The isolated CBM27 domain, named TmCBM27, binds tightly (K(a)s 10(5)-10(6) M(-1)) to beta-1, 4-mannooligosaccharides, carob galactomannan, and konjac glucomannan, but not to cellulose (insoluble and soluble) or soluble birchwood xylan. The X-ray crystal structures of native TmCBM27, a TmCBM27-mannohexaose complex, and a TmCBM27-6(3),6(4)-alpha-D-galactosyl-mannopentaose complex at 2.0 A, 1.6 A, and 1.35 A, respectively, reveal the basis of TmCBM27's specificity for mannans. In particular, the latter complex, which is the first structure of a CBM in complex with a branched plant cell wall polysaccharide, illustrates how the architecture of the binding site can influence the recognition of naturally substituted polysaccharides.

PubMed: 12791255
DOI: 10.1016/S0969-2126(03)00100-X

Experimental method

X-RAY DIFFRACTION (1.35 Å)